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There are some projects that would probably be much better-served if
they could all be administered from a single rc.d script, and for which
setting up a new rc.d script each time you run a new instance of the
daemon is difficult and painful.
For one such creature (the Perforce server daemon,) I've written an rc.d
script which is basically an extension to the rc.subr mechanism so that
a single rc.d script can manage an unlimited number of slave servers
simultaneously.
I'm attaching it to this note.
The criticisms I've received so far (all quite valid) are:
1. It uses hard-coded default locations.
2. It uses some extension logic which would of course break if rc.subr
ever changes significantly.
Can someone tell me what direction this *should* go to do things
correctly? Is an rc.d which is aware of the rc.subr and over-rides some
of the rc.subr mechanisms the right way to go about extending the
logic? Each daemon (Perforce for example) is unique enough to require
some fairly complex logic to handle things anyway. I have trouble
envisioning a generic framework which could be used to extend rc.subr
in a way that would be useful to people like me, and I suspect that
we'd end up re-writing large chunks of it anyway.
The primary problem is that in some cases (mine for example) you
actually do need to run twelve, thirteen, or twenty instances
simultaneously and the ability to run:
/etc/rc.d/p4d checkpoint
... without additional arguments is *so* useful. Or, if you want to run
it against just a single one:
/etc/rc.d/p4d checkpoint test_2001.1
Overview of Features
/etc/rc.d/p4d
Usage: /etc/rc.d/p4d [fast|force|one](start stop restart rcvar
checkpoint upgrade refresh verifydb status poll) [main test992 test011
test012 test021 test022 test031 test032 test042 test051 test052 test061
test061_104454]
. Can checkpoint cleanly.
. Is aware of unclean shutdowns (machine crashes for example.)
. Can upgrade cleanly.
. Can refresh the db.* files which repacks them optimally for space and
read-speed purposes.
. Can run a verification -xv to check db.* consistency.
. Is pretty smart about killing and restarting its daemons.
. Additional daemons can be instantly configured or destroyed with
rc.conf.d.
Comments much appreciated.
P.S. Please reply only to the list; my MX is a little finnicky about
incoming mail.
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